Hey there.
I am working for the first time with Inquisit and don't get how to encode in the right way...
we would like to present a 2-back task, where the subject has to press a key instantly when a picture ist presented, that happened to be presented 2 pictures ago.
For example: the pictures are presented in a random way...
picture a, picture b, picture c, picture b (now you have to press the key!!)... (below is the code)
we would like the pictures to be presented randomly without a solid order. Currently the experiment just presents a fixed order and you can't really call it an experiment... plus you can't react...
so what do I need?
The code for the button (space), that you press, when the picture appears again (picture a - picture b - picture c - picture b (now press button!!)).
Plus the code for a random order without an end of the experiment (or maybe an end after 5 minutes and not just a few stages...
I hope someone understand what I mean and where I need help :)
thx very much <3
_______________________
the Code:
<picture grid1>
/ items = ("m.png")
/ position = (50,50)
</picture>
<picture grid2>
/ items = ("m.l..png")
/ position = (50,50)
</picture>
<picture grid3>
/ items = ("m.r..png")
/ position = (50,50)
</picture>
<picture grid4>
/ items = ("o.l..png")
/ position = (50,50)
</picture>
<picture grid5>
/ items = ("o.m..png")
/ position = (50,50)
</picture>
<picture grid6>
/ items = ("o.r..png")
/ position = (50,50)
</picture>
<picture grid7>
/ items = ("u.l..png")
/ position = (50,50)
</picture>
<picture grid8>
/ items = ("u.m..png")
/ position = (50,50)
</picture>
<picture grid9>
/ items = ("u.r..png")
/ position = (50,50)
</picture>
<trial 0_1>
/ stimulustimes = [1=grid1]
/ timeout = (1000)
</trial>
<trial 0_2>
/ stimulustimes = [1=grid2]
/ timeout = (1000)
</trial>
<trial 0_3>
/ stimulustimes = [1=grid3]
/ timeout = (1000)
</trial>
<trial 0_4>
/ stimulustimes = [1=grid4]
/ timeout = (1000)
</trial>
<trial 0_5>
/ stimulustimes = [1=grid5]
/ timeout = (1000)
</trial>
<trial 0_6>
/ stimulustimes = [1=grid6]
/ timeout = (1000)
</trial>
<trial 0_7>
/ stimulustimes = [1=grid7]
/ timeout = (1000)
</trial>
<trial 0_8>
/ stimulustimes = [1=grid8]
/ timeout = (1000)
</trial>
<trial 0_9>
/ stimulustimes = [1=grid9]
/ timeout = (1000)
/validresponse = (" ")
<block nback>
/ trials = [1=0_1;2=0_2;3=0_3;4=0_4;5=0_5;6=0_6;7=0_7;8=0_8;9=0_9]
</block>
<expt >
/ preinstructions = (to do)
/ postinstructions = (thanks)
/ blocks = [1=replace(nback); 2=replace(nback); 3=replace(nback); 4=replace(nback)]
/ order = random
</expt>